Muffler.



R. L. McELROY.

MUFFLER APPLlCATlON FILED 05023. 1915.

1,242,219. Patented Oct. 9,1917.

2 SHEETS-SHEET I.

Inventor.

Robe/'77 Z. "E l 05/ fl)- W 13y maflzzy,

Witnesses:

R. L. McELROY.

MUFFLER. APPLlCATlON FILED DEC-23.1915.

Patented Oct. 9,1917.

2 SHEETS-SHEET '2 ROBERT If, McIElhlmlZ', OF NEW YQJJPIK, N. Y.

MUFFLER.

Specification of Letters Eatent.

Patented Oct. 1917.

Application filed December as, 1915. Serial No. 68,327.

. To all whom it may, concern."

Be it known that I, Bonner L. MoELnor, a citizen of the United States, residing in New York, in the county of New State of New York, have invented certain new and useful Improvements in Muhiers, of which the following is a specification.

The objects of this invention are'pfimarily to provide, a mufller of a light, simple and cheap form of construction, which may be used for mufiling theexhaust from pressure engines of all kinds, but which ismore especially adapted to be used on those of the explosion type; and by its peculiar construction, contours, and the arrangement of the entire structure, the gases in their pas sage therethrough are divided into a plurality of currents which impinge upon each other, whereby while the noise of the exhaust is greatly lessened, back-pressure is reduced to a minimum.

These and other features, capabilities and advantages will more fully appear from the subjoined detail description of one specific embodiment thereof, in which Figure 1 is a fragmentary view of the present invention, partly in section.

Fig. 2-is a side view thereof, partly in section.

Fig. 3 is a section taken on the line 3-3, of Fig. 1.

Fig. 4 is another section taken on the line 44.-, of Fig. J4.

Fig. 5 is a plan diagram showing the direction of-the gases.

F'g. 6 is another plan diagram showing the path of gases from exhaust to the atmosphere.

F1g. 7 is a plan view of the mufier complete. c

Fig. 8 is a fragmental side elevatlon of the fan-shaped mouth of the muffler.

In Fig. 1 there is shown an exhaust pipe connection 1 leading from the engine to the muflier chamber passing in the direction of the arrow at. The housing is comprised of an annular tubular member 2 which is jointed at its axes by a similarly constructed tubular member 3, the said member 3 being,

in the present instance, arranged in a plane York and substantially at right angles to the plane in which member 2 is disposed in such a manner that they areconnected to one another to produce an arrangement resembling two connected chain links.

The first expansion chamber 2-, which is of substantially tubular construction, is intersected by a cut a through its tubular sectional area Which may be ascertained in Figs. 1 and i. The second expansion chamher 3 is so arranged as to inclose this slotted exhaust opening 4 so that when the gases from the engine follow the direction of the arrows a, 5 and 0, they come together at the point or slot 4 and the mutual impinging of the gases at equal pressure cause the same to escape through the slot 4 whereupon the gases are permitted to flow into the second chamber 3, and thence they follow in the direction of the arrow 0? to the atmosphere. It will therefore be seen that my device comprises essentially two substantially 1101- low annular members in communication with one another, one member communicating with the connection from the engine, and the other annular member communicating with the connection to the atmosphere.

The tubular member 3, as clearly shown in Figs. 1 and 7, conforms to the inner periphery of the tubular member 2 while passing therethrough, which is comparatively small relatively to the enlarged portion 6 thereof disposed at the outer periphery of the tubular member 2. The fan-shaped pipe connection 5 from which the exhaust gases are. fed to the atmosphere, is connected to the enlarged portion 6, being comparatively large where it connects with the enlarged portion 6 and being formed into a spreadout narrow fan-shaped mouth 7 at its free end.

In order to more fully understand the action of the gases in m construction, reference may be had to Flgs. 5 and 6, wherein Fig. 5 represents the direction of gases as they leave pipe 1 at expansion chamber 2 and impinge upon each other at the point 4 and thereafter discharge to the atmosphere at 5. Fig.6 may be termed a side elevation of Fig. 5 inasmuch as it represents the path -1, a pair of lugs While any suitable means may vided for afiixing be prosupport, I have shown in the drawings, Fig. X, Y, which may be drilled and tapped in order to permit of the use of suitable bolts for the purpose described.

Heretofore in mufflers of the known type, such as used in pleasure vehicles and the like, the excess exhaust pressure from gas engines and the like, has been progressively cooled and expanded through a series of chambers having a common port, one leadinhg into the other,"and thence to the atmosp ere.

In the present device, I do away with all bathe-walls and simply cause the gases to travel in such a direction that the stream is divided into two arms or branches, said two branches then being consequently directed fully against each other, thereby constituting an elastic and gradual expanding means, the said gases being limited in their expansion to atmosphere by reason of the constriction of the orifice 4. This orifice, as shown, is preferably annular, but it is obvious that it ma be of any other shape or contour that will permit the. simultaneous meeting of equal volumes of gas. It is therefore apparent that by doing away with the customary bafiles, and also the numerous chambers. common to prior mufflers, the present modification may be made in a cast metal such as aluminum, thereby lightening the mufiler and making the, same a unitary or integral structure.

I claim:

1. A mufiler comprising a housing forming a primary annular chamber and a secondary annular chamber, the principal planes of said chambers intersecting each other, each chamber passing through the center of and surrounding a portion of the other chamber, said chambers being connected by an annular opening disposed in that portion of the primary chamber that is surrounded by the secondary chamber, said chambers being provided respectively with lateral openings remote from said annular opening.

2. A mufiler comprising a housing forming a primary annular chamber of constant internal diameter, and a secondary annular chamber, the principal planes of said chambers intersecting each other, each chamber passing through the center of and surrounding a portion of the other chamber, said chambers being connected by an annular opening disposed in that portion of the primary chamber that is surrounded by the mufiler in operative position to a vehicle or other satisfactory planes of said chambers intersecting each other at right angles, each chamber passing through the center of and surrounding a portion of the other chamber, said chambers being connected by an annular opening disposed in that portion of the primart'ly chamber that is surrounded by the s con ary chamber, said chambers being provided respectively with lateral openings remote from said annular opening.

, 4. A mufller comprisin a housing forming a primary annular c amber and a secondary annular chamber, the rincipal planes of said chambers intersecting each other, each chamber passing through the center of and surrounding a portion of the other chamber, said chambers being connected by an annular opening dis osed in that portion of the primary cham er that is surrounded by the secondary chamber and in the plane of the secondary chamber, said chambers being provided respectively with lateral openings remote from said annular opening.

5. A mufller comprising a housin forming a primary annular chamber an a secondary annular chamber, the principal planes of said chambers intersecting each other, each chamber assing through the center of and surroun ng a portion of the other chamber, said chambers being connected by an annular opening disposed in that portion of the primary chamber that is surrounded by the secondary chamber, said chambers being provided respectively with lateral openings remote from said annular opening, the secondary chamber gradually decreasing in internal diameter from its lateral opening to the opposite side of the chamber.

6. In a mufiler, the combination of a hous- 1ng forming a primary annular chamber and a secondar annular chamber, the principal planes o said chambers intersectin each other, each chamber passing througi the center of and surrounding a portion of the other chamber, said chambers being connected by an annular opening disposed in that portion of the primary chamber that is surrounded by the secondary chamber, said chambers being provided respectively with lateral openings remote from said annular opemng, and pipes in said lateral openings co-axial with the line of intersection of said planes. 7. In a mufiler, the combination of a housing forming a primary annular chamber and a secondary annular chamber, the principal planes of said chambers intersecting each other, each chamber passing through the center of and surrounding a portion of the other chambers, said chambers being connected by an annular opening disposed in that portion of the primary chamber that is surrounded by the secondary chamber, said chambers being provided respectively with lateral openings remote from said an- ;nular opening, and a fan shaped pipe con- 10 nection communicating with said lateral opening of the secondary chamber and having its principal plane coincident With the plane of the secondary chamber.

ROBERT L. MOELROY. Witnesses:

JAMES G. NOLEN, GUSTAV DREWS. 

